Double glazed window



Dec. 24, 1940. w OWEN 2,226,254

DOUBLE GLAZEDYWINDOW "Filed April 22, 1938 Wu. 1.. Ian Owe-N Patented Dec. 24, 1940 nounw omzsp wmnow William Owen, Pittlbnrgh, r... assignor to rimburgh Plate. Glass Comp ny, Allegheny County, Pa a corporation of Pennsylvania Application April 22, 1938, SeriaiNo'. 203.571 1 Ciaim. (CL 2046.5)

The invention relates to double glazed windows, and particularly to means for applying a second sheet or pane of glass to existing single glazed windows employing wood sash. The invention 5 has for its principal objects the provision ofan" improved construction of the type specified, (1) which is easily applied and removed from the ordinary sash, (2) which requires no screws 'or carpentry work in installing, (3) which is secure 10. and tight, (4) which can be applied without difficulty even though there is some departure from exact pane size. due to inaccuracy in cutting, and (5) which is inexpensive and durable. Certain embodiments of the invention-are illustrated in 1 the accompanying drawing, wherein:

Figure 1 is a partial front elevation of the construction. Fig. 2 is a section on the line 11-11 of Fig. 1. And Figs. 3, 4 and 5 are sections through modifications.

Referring to the drawing, 6 is-the window sash 'of wood and 1 is a pane of glass mounted on the outer side of the frame and held in position by putty 8 or other suitable meanswhich maintain this pane in a relatively permanent position in 5 the sash. Mounted on the'inner side of the pane 1 in parallel therewith is the second paneof' glass 9 carried in a'sheet metal frame i0, such sheet metal frame being. provided with achannel ii carrying the edges of the pane 9. A strip of 30 rubber l2, U-shape in cross section serves to cushion the glass in the channel, and if desired, other suitable cushioning materials may be employed. The frame i is provided'with a pair of spring flanges l3 and I4 which engage the wall 35 surrounding the sash openin as shown. The flange l3 acts as a spacer between the two panes of glass and has its lower end recurved, as indicated at l5. This flange is so proportioned with respect to the sash opening that when the frame 40 .is pushed into position, the flange I presses with considerable force against the wall of the sash. the purpose being to insure a seal by this pressure and also to' assist in maintaining the frame against accidental displacement. The other 45 flange I4 engages the sash outward of the flange l3, being seated on one ofthe steps I, constituting the customary ornamentation of the ordinary sash. It-is possible to engage the end of the flange II on one of several of the steps, depend- 50 ing upon the amount of force applied in pressing the flange ll inward, and it is the springpressure which is thus exerted upon the sash by this flange which gives the main anchoring, effect of the frame in the sash.

The frame is preferably- 55 ,made in four sections, as indicated in Fig. i, such sections meeting along the bevel lines ii. If desired, they may be soldered together along these lines, although. it is practical to use the structure without attaching the sections together, this being the simpler and cheaper method of apply- 5 ing the construction. I

Due to the spring character or the flanges l3 and II, it is possible to use the frame, even though it ls'not a perfect fit in the sash, since the flanges will give and permit them to be forced'into position. It is thus not necessary to cut the pane 9 to size with the same degree of-accuracy as is necessary in structures which have only a small amount of yield, such as rubber mountings which have heretofore been proposed. Further, due to the two point engagement of the flanges i3 and a I! with the sash, the danger of accidental displacement of the .frame is materially reduced. Any outward force-as applied to the pane 9, due,

to air suction orother causes, is strongly resisted by the flange it since the outward movement of the pane tends to force the end of the flange more strongly against the step-of the sash with which it engages.

same in principle as that of Figs. 1 and 2', the primarydiiierence being in the shape of the frame, and particularly the flange It.- .This flange hasa 'V-shaped bend it and the extremity of the flange is provided with a rubber cushion 20 which 'engages the pane l and presses against'the wallef the sash opening. The use of this rubber provides a somewhat better seal between the sash and the space between the two panes than does the recurved end It of the flange H, as shown in Fig. 2. l

Fig. 4 shows a further modification, in which the flanges 2i and 22- are shaped only slightly diiferent from those of the Fig. 2 construction, the primary distinction here over the structure 40 of Fig. 2,'being the use of the screws 23' extending through the flange 22 and into the sash for giving greater security to the mounting of the frame. As heretofore explained, the mounting of-the sash is relatively secure without the screws, and ,in most cases, it is preferred to dispense with such screws because of the extra labor involved in the installation} but in special locations where additional security is required, a single screw oneach side of the sash will insurepositively against accidental displacement of the inner pane 9.

V In the Fig. 5 construction, a strip of rubber 24 is provided as a spacer, such rubber being seated in a channel 25, which constitutes one of-the flanges of the frame corresponding in function Fig. 3 illustrates a modification which is the 25 permanently mounted pane on its outer side, a.

removable unit mounted in the sash on its inner side comprising a second pane in parallel with the first pane, and asheet metal frame therefor provided with a channel receiving the edges of the second pane and having a spring flange on each side of the channel in yielding engagement 5 with the portion 01' the wall of the sash opening which extends transversely of the plane of the panes, one of said flanges having its end in engagement with the flrstpane and cushioned with rubber so that it acts as a spacer between the 10 two panes.

WILLIAM OWEN. 

